Ferritic-austenitic heat-resistant
1.4821
TP 327
X15CrNiSi25-4
Ferritic-austenitic heat-resistant steel with better resistance to oxidising and especially reducing sulphur-bearing gases than the austenitic Cr-Ni heat-resistant grades.
Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | 0.1–0.2 |
| SiSilicon | 0.8–1.5 |
| MnManganese | ≤2 |
| PPhosphorus | ≤0.04 |
| SSulphur | ≤0.03 |
| CrChromium | 24–27 |
| NiNickel | 3.5–5.5 |
Mechanical properties
room temperature- Scaling temperature (°C)
- 1100
Standard equivalences
- DIN/EN
- X15CrNiSi25-4
- AISI
- 327
- SS
- 2322
- AFNOR
- Z20 CNS 25.04
- PN
- H26N4
Typical applications
- Spacer tubes in the gypsum industry
- Plant and apparatus construction
- Furnaces and combustion chambers
Frequently asked questions
What is 1.4821 (TP 327)?
1.4821 (X15CrNiSi25-4) — Ferritic-austenitic heat-resistant. Ferritic-austenitic heat-resistant steel with better resistance to oxidising and especially reducing sulphur-bearing gases than the austenitic Cr-Ni heat-resistant grades.
Which grades are equivalent to 1.4821?
1.4821 corresponds to EN X15CrNiSi25-4; equivalent designations: AISI 327, SS 2322, AFNOR Z20 CNS 25.04, PN H26N4.
Indicative values — verify against the applicable standard before specifying.
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